Vulnerability Description
LuCI versions fail to properly encode DHCPv6 lease hostnames before rendering in status tables, allowing adjacent network attackers to inject HTML markup. Attackers can send a DHCPv6 Client FQDN containing script tags that execute in the administrator's browser when viewing DHCP lease pages.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/openwrt/luci/security/advisories/GHSA-686p-p8p9-x6fh
- https://www.vulncheck.com/advisories/luci-dhcpv6-lease-hostname-stored-cross-sit
- https://github.com/openwrt/luci/security/advisories/GHSA-686p-p8p9-x6fh
FAQ
What is CVE-2026-61876?
CVE-2026-61876 is a vulnerability with a CVSS score of 8.8 (HIGH). LuCI versions fail to properly encode DHCPv6 lease hostnames before rendering in status tables, allowing adjacent network attackers to inject HTML markup. Attackers can send a DHCPv6 Client FQDN conta...
How severe is CVE-2026-61876?
CVE-2026-61876 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-61876?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.